Commercial Fishing Sailboat

Discussion in 'Boat Design' started by MickT, Nov 14, 2010.

  1. Stumble
    Joined: Oct 2008
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    Stumble Senior Member

    There are a number of sail assisted fishing boats in operation today. However the new designs use a product from skysail.com not traditional mast arrangemtns. I don't know what the availability is for a rig this small, but it seems to be ending testing phase and moving into production.
     
  2. Tad
    Joined: Mar 2002
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    Tad Boat Designer

    Hauling is done with the bow pointing upwind, cocked off the wind so you blow off the gear rather than over it. A riding sail is set aft, you see this in the Bering Sea, Iceland, Norway, Maine Lobsterboats, and in the Baltic......this pushes the bow up into the wind. But still you are in and out of gear thousands of times a day....few gearboxes can stand the strain year after year.....monster Twin Disc is the only answer

    A riding sail.....from A Guide To Fishboats of British Columbia, 1985, Tad Roberts

    pp21sm.jpg
     
  3. BATAAN
    Joined: Apr 2010
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    BATAAN Senior Member

    The Norwegian fishing boats use a controllable pitch propeller and can "fine tune" the approach to a pot buoy very nicely. It never goes out of gear. Sabb/Bergen makes a nice hydraulic version that's suitable up to 300 hp and can go on most engines. This also is the best way to motor-sail as you can get exactly the right engine loading very easily with tach and exhaust gas pyrometer.
     
  4. michael pierzga
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    michael pierzga Senior Member

    So if you fish nose to the wind, gear over the windward side then a mast or rigging is going to cause leeway and consume more energy than a naked fishing boat. . A commercial sail fisher would want to reduce windage with the shorest possible rig, least amount of standing rigging that is capaple of hoisting the most sail area. That kite sail rig looks interesting....zero windage when the vessel is in motor mode.. Have know idea if its practicle. a modernized Gaff rig with very large reefing topsails . Chinese rig ? A free standing mast ? A folding or telescoping mast ?
     
  5. MickT
    Joined: Nov 2010
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    MickT Junior Member

    That's not something that can be determined before you know what you have to work with. There are lots of different ways to skin a cat. It doesn't do to ignore the experience of those that came before you, but the powerblock wasn't invented until the 50's, so it doesn't do to pay that much attention to it either. Pelagic longliners often set 40 miles or more of gear, something this boat won't ever do. So how they fish, while useful to know, isn't really relevant. If the boat can sail with the fish aboard, I will either figure out a way to fish her, or not. I see I jumped the gun on this thread, i'm going to have to do some studying and come back with some actual equations before it would be a useful conversation, although I definitely appreciate all your ideas/advice. I was trying to make up my mind on whether it was worth the effort to look into and yall have helped me decide that it is. This is one of the most helpful forums i've ever seen. Thank you.
     
  6. JRMacGregor
    Joined: Oct 2005
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    JRMacGregor Junior Member

    Just in case it is of passing interest...................the Scottish sailing herring drifters used to haul their miles of drift nets over the stern quarter. Less freeboard and windage there.

    When they converted to motor (and had a stern wheelhouse), they moved the capstan to the bow and hauled over the bow quarter (as did the steam drifters of the type posted by Peter Radclyffe). They used a steadying sail at the stern to keep their head up.
     
  7. apex1

    apex1 Guest

    Normal "Reintjes" would be better.........

    But the average CPP is the perfect answer. For that reason you don´t find many gearboxes in the north of Europe, only CPP´s, living happily and reliable for decades. On top, they save alot of fuel, and are cheaper than a heavy gear.

    Helseth, Hundested, Nogva and Westmekan are the common names. Sabb is only for small appliances. See my thread if the interest goes deeper.

    Regards
    Richard
     
  8. BATAAN
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    BATAAN Senior Member

    SABB makes a line of CP props with hydraulic pitch control for most engines up to 300 hp. While I have a 30 HP SABB engine in my boat, this is something different.
     
  9. apex1

    apex1 Guest

  10. BATAAN
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    BATAAN Senior Member

    Noted.
     
  11. RHP
    Joined: Nov 2005
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    RHP Senior Member

    Take a look at this Dix design available as a cargo sailor:

    'A large gaffer able to earn her keep ~ Suitable for charter, excursion or cargo'

    http://www.dixdesign.com/hb70.htm

    I've seen an open decked charter version in Cape Town looks a fine vessel.
     
  12. TurcoLoco
    Joined: May 2009
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    TurcoLoco New Member

    People, The solution is a KITESAIL, an aft pilothouse design similar to an Nordhaven 68 with an inteligent ROBOT arm istead of an "stupid" crane at bow with the capacity to launch an big kite. I was always an sailor, now I kitesurf, so can an specialized Trowler.
     
  13. RHP
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    RHP Senior Member

    Fishermen designed and sailed various types of fishing boats for centuries with lines and displacement that reflected their ability to harness the wind. No harm in looking into the past to see how those designed 'peaked' as steam engines arrived.

    Kitesails might be effective but also need crew involvement as opposed to to a quickly bastardised gaff main as the Nobbies etc.. used to use to depower in an instant.
     
  14. Kanfish
    Joined: Nov 2010
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    Location: Northland , New Zealand

    Kanfish Kansai Fishing Company

    MickT,
    Nice to be able to send you this info.
    Please see; www.kansaifishing.co.nz
    This new website has only been up since 23rd October 2010 and maybe just what you are looking for I would think.
    Please read and review everything pertaining to this vessel ( including my History page and Super Yacht page ) and I think most of your wants may indeed be met. I could single hand this vessel and I am sure you could too.

    Cheers

    Rodney
     

  15. Kanfish
    Joined: Nov 2010
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    Location: Northland , New Zealand

    Kanfish Kansai Fishing Company

    Sail assisted fishing vessel

    Hello MickT,
    please have a look everybody at ; www.kansaifishing.co.nz

    New web site 23 rd October 2010. Total concept of a ' Sail Assisted ' fishing vessel for minimal sailing experience. This unit fits pretty much what MickT is asking for and way more than that too in so many other ways.
    I am looking forward to comments and feed back naturally.
    New member; Rodney Davidson - New Zealand,
     
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